A:
Positive:
1 x 781420155 x 156284037 x 1116314535 x 223262949 x 1594735245 x 318947313 x 2496551019 x 766851565 x 499312191 x 356655095 x 153377133 x 10955
Negative:
-1 x -78142015-5 x -15628403-7 x -11163145-35 x -2232629-49 x -1594735-245 x -318947-313 x -249655-1019 x -76685-1565 x -49931-2191 x -35665-5095 x -15337-7133 x -10955
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 78,142,015, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 78,142,015 | |
| -1 | -78,142,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 78,142,015.
Example:
1 x 78,142,015 = 78,142,015
and
-1 x -78,142,015 = 78,142,015
Notice both answers equal 78,142,015
With that explanation out of the way, let's continue. Next, we take the number 78,142,015 and divide it by 2:
78,142,015 ÷ 2 = 39,071,007.5
If the quotient is a whole number, then 2 and 39,071,007.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 78,142,015 | |
| -1 | -78,142,015 |
Now, we try dividing 78,142,015 by 3:
78,142,015 ÷ 3 = 26,047,338.3333
If the quotient is a whole number, then 3 and 26,047,338.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 78,142,015 | |
| -1 | -78,142,015 |
Let's try dividing by 4:
78,142,015 ÷ 4 = 19,535,503.75
If the quotient is a whole number, then 4 and 19,535,503.75 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 78,142,015 | |
| -1 | 78,142,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 49 | 245 | 313 | 1,019 | 1,565 | 2,191 | 5,095 | 7,133 | 10,955 | 15,337 | 35,665 | 49,931 | 76,685 | 249,655 | 318,947 | 1,594,735 | 2,232,629 | 11,163,145 | 15,628,403 | 78,142,015 |
| -1 | -5 | -7 | -35 | -49 | -245 | -313 | -1,019 | -1,565 | -2,191 | -5,095 | -7,133 | -10,955 | -15,337 | -35,665 | -49,931 | -76,685 | -249,655 | -318,947 | -1,594,735 | -2,232,629 | -11,163,145 | -15,628,403 | -78,142,015 |
Here are some more numbers to try:
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